DE2359446A1 - Surface heating for buildings and floor spaces - uses pipes with flat section terminating in round section - Google Patents

Abstract

Flat pipes are laid in floors or walls of buildings so as to present the greatest possible surface area, and the ends are deformed to a round section to make connection to piping possible. Wh ile metal may be used, it is pref. to use a plastics material such as woven polyethylene with a sufficient memory effect so that on reheating and with the aid of mechanical means, the flat section may be readily changed to a round section. The heat exchanger also has corrosion resisting pipes, pref. of woven polyethylene. The heating arrangement is particularly suited to floors, where because of the large surface area of the pipes, the water temp. can be approx. 28 degrees C.

Description

Thomas Engel

235944S

Surface heating belt for buildings and open spaces.

For the heating of apartments, churches, warehouses, etc. there will be more and more surface heating systems are used because they are practical and in energy yield are better than conventional heating »In addition, they are space-saving because convectors or blowers are not required. Surface heating is used in the ceiling, the walls, but preferably in the The floor is built in in such a way that pipes are laid under the screed or plaster, through which warm water is pumped. Included it is important to accommodate as much pipe as possible per square meter, so that the system can be operated at a relatively low temperature. A certain amount of calories is needed to warm up a room. For example, if you install 7 m of pipe per square meter of floor, the slender

o be accommodated in a compliant manner, the hot water temperature is 34 C required to achieve the required heating effect. That has the disadvantage that you feel an uncomfortable sensation of warmth on your feet if you stands directly on a pipe. However, if you are able to work 10 m of pipe and more per square meter, so you can lower the overall level of temperature

ο and the same effect occurs at a water temperature of η ur approx. 28 C * In other words, the larger the surface of the heat-donating tube is, the cheaper and smoother the achievable heating effect, how one which also knows from heat exchangers in other areas. That's why you have Aluminum plates are arranged over the pipes in order to increase the local heat emission of the pipe due to the good thermal conductivity of the aluminum. Such systems have proven their worth, but they are expensive and require a relatively large amount of technical effort,

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It has now been found that a very large surface area for heat dissipation can be achieved in a simplified manner using a rake pipe, without incurring additional costs, so that you get a surface heating with high efficiency. That would already be possible because steel, copper or plastic flat tubes are used and in the familiar form in the building area. The problem, however, is that it is very difficult to get from the flat tube profile to the round profile, which is necessary to attach connecting elements, such as fittings. It will therefore proposed the pipes used as heat transfer media to the respective for the connection elements necessary ends by deformation, for example by means of heat, to be reworked as a round tube, so that the connecting elements in The usual way can be attached. Pipes made of cross-linked polyolefins, such as polyethylene, which have a good memory effect, are very suitable for this.

The practical execution is made in such a way that the round tube is formed into a flat tube during extrusion. A commercial pipe with an outer diameter of 50 mm would then, for example, have a total board of 30 mm, which is a 50% increase in the surface upwards is equivalent to. This Rachrohr is then laid on the construction site in the well-known Wetee, by rolling up. At the turning points this becomes Pipe is now heated by means of a suitable heat source so that, caused by the memory effect, the flat tube takes on its contour again to the round tube. This enables you to "perform the reversal of 180 required for underfloor heating" without any further changes. After the reversal, the pipe runs because again as a flat tube, in the intended length to the connection end, where it is connected to a connecting element, for example a fitting will. At this point, the pipe wte is heated in the prescribed manner, so that ee again automatically assumes the round shape here. - Through this the connection with other elements can be carried out without difficulty will.

Figure 1 corresponds to the round tube, fig. 2 deformed as a rectangular tube or

other, arbitrary shape design with a large surface, such as Fig. 3 If necessary, the efficiency of the enlarged surface can be increased by this

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can be increased, that you can heat insulating sheets over the pipes Attaches material.

_S heating systems it is coal, gas or Cl ₉ are known to have a relatively low efficiency, of about 35 - is 40%. The remaining energy is lost through poor combustion with the h @ iss @ n exhaust gases. According to the invention, pipes made of cross-linked polyethylene are now attached to the outlet of the combustion _{device s} 2 _e B "in the fireplace in the case of an oil-fired boiler, in the form and function of a heat exchange through which the water of the underfloor heating is pumped in the circuit. The heat exchanger is designed, for example, in such a way that a tubular chimney is produced from cross-linked polyethylene pipes in a winding process, which is inserted into. the brick fireplace is inserted from above and connected to the underfloor heating circuit. Although cross-linked polyethylene has good temperature resistance, the distance between the heat exchanger and the burner is chosen so that the plastic is not damaged. Below the heat exchanger, a corrosion-resistant collecting container is advantageously arranged in order to collect and discharge any aggressive condensate that may arise from the combustion. Of course, this facility is also suitable for heating water.

It is evident that due to the increased surface area of the heat transfer tube and / or the connection of the heating system to a heat exchanger connected downstream of the combustion system, the energy yield of the fuel is increased considerably, so that the invention is based on a technically economic advantage.

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Claims (1)

Patent claim 1t surface heating for buildings, characterized in that ducts made of metal or plastic with the largest possible surface on the heat demand side are laid in buildings and open spaces, that the duct is deformed into a round pipe at deflection or connection points, so that installation and connection are carried out without difficulty can be· Patent claim 2 t building and open space heating, according to claim 1, characterized in that cross-linked plastic pipes are used, preferably made of polyethylene, the memory effect of which is sufficiently large to allow the change from the rake pipe to a round pipe when re-heated, if necessary with the help of mechanical assistance to enable. Claim 3; Building and open space heating, characterized in that devices that are characterized by increased thermal conductivity are installed above the chimney pipe. Patent claim 4: Building and open space heating, characterized in that a heat exchanger made from corrosion-resistant pipes, for example cross-linked Folyaethylene, is arranged at the exit of the combustion system and is controllably connected to the heating and / or hot water system. 509824/0037